| Abstract: |
| Nd3+:NaLa(WO4)2 crystals with a dimension up to 7 mm were grown from a high temperature solution using a double-crucible method. Scanning electron microscopy observations of the crystals showed that there were no small cracks on the surface of the crystals although they underwent two phase transitions when cooling down from high temperatures. X-ray diffraction studies indicated that the as-obtained product is pure low- temperature tetragonal Nd3+:NaLa(WO4)2. The absorption and fluorescence spectra for Nd3+:NaLa(WO4)2 were measured at room temperature. The absorption band at 804 nm has a wide full-width half maximum of 23 nm whose origin is discussed. The absorption and emission cross sections were calculated to be 7.24*10-20 cm2 at 804 nm and 6.54*10-20 cm2 at 1057 nm, respectively. |
| Key words: Crystal growth, Double-crucible method, Tungstates, Optical properties |
| FundProject: |
附件 |
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| Nd3+:NaLa(WO4)2晶体的生长和光学性质 |
|
陈池来 , 侯永生 , 蔡维理 , 姚连增
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中国科学技术大学材料科学与工程系，合肥230026
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| 摘要: |
| 用双坩埚法从高温溶液里生长出线度达7 mm的Nd3+:
NaLa(WO4)2晶体. 扫描电子显微镜的观察结果表明，虽然在晶体冷
却过程中经历了两个相变，但相变并未造成晶体开裂；样品的X射线
衍射花样可以看出，所得晶体为纯低温四方相的Nd3+:NaLa(WO4)2.
在室温下对晶体的光吸收和光发射作了测量，发现晶体在804 nm有
个半高宽达到23 nm的宽吸收峰. 计算出晶体在804 nm处的吸收截面
为7.24*10-20 cm2，在1057 nm处的发射截面为6.54*10-20 cm2. |
| 关键词: 晶体生长, 双坩埚法，钨酸盐，光学性质 |
| DOI：10.1360/cjcp2006.19(6).523.4 |
| 分类号: |
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